Nissan Versa (N17): Refrigerant pressure sensor

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / Refrigerant pressure sensor

Component Function Check

1.CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION

  1. Start engine and warm it up to normal operating temperature.
  2. Turn A/C switch and blower fan switch ON.
  3. Check the voltage between ECM harness connector and ground.  

Is the inspection result normal?

YES >> INSPECTION END

NO >> Go to EC, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK GROUND CONNECTION

  1. Turn A/C switch and blower fan switch OFF.
  2. Stop engine.
  3. Turn ignition switch OFF.
  4. Check ground connection E15. Refer to Ground Inspection in GI, "Circuit Inspection".

Is the inspection result normal?

YES >> GO TO 2.

NO >> Repair or replace ground connection.

2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

  1. Disconnect refrigerant pressure sensor harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between refrigerant pressure sensor harness connector and ground

Is the inspection result normal?

YES >> GO TO 4.

NO >> GO TO 3.

3.DETECT MALFUNCTIONING PART

Check the following.

  • Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
  4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 6.

NO >> GO TO 5.

5.DETECT MALFUNCTIONING PART

Check the following.

  • Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

  1. Check the continuity between ECM harness connector and refrigerant pressure sensor harness connector.
  2. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 8.

NO >> GO TO 7.

7.DETECT MALFUNCTIONING PART

Check the following.

  • Harness for open or short between ECM and refrigerant pressure sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

Is the inspection result normal?

YES >> Replace refrigerant pressure sensor. Refer to HA, "Removal and Installation".

NO >> Repair or replace.

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